Interlocking system



Jan. 13, 1931. s. BQKIDD 1,739,251

INTERLOGKING" SYSTEM Filed June a, 1929 2 Sheets-Sheet 1 'zl: lNVENTOl-P 8. H B. K100 ATTORNEY Jan. 13, 1931.

S. H. B. KIDD INTERLOCKING SYSTEM Filed June 3. 1929 2 Sheets-Sheet 2 its associated latches. :In many casesywherej a number of closures are inter-related, 1t isan' advantage it means: be provided: so 'that a closure is fully closed andv latched-. Such.

Patented Jan. 13, 1931 s'rErHEN'H. i3. Krnn, GEE-MONTREAL. QUEBEC;

da mit, Assrqnon TO VTES'IERN'ELEC;

TBIGCOMPANY; mooaroaa'rnng or YN'EWSYOEK', 1t- Y; A oonrom rron oaiinw YORK m'rnmlooxrne' SYSTEM Application filed luneti', 1929. 'SerialNo. 367,892. g

This invention: relates to looks and latches, and more particularly to a master lock and master lock cannot b'eaoperated unti levery conditions are found, by way of exampl'e,:in the case of tool carts, bakers carts,v lockers in gymnasiums, filing. cabinets, windows and doors of automobiles, etc.

An object of this invention is'toj-provide latching means for a plurality of cl:osures,.

so arranged that ainaster lock cannot be operated until alhthe closures are. closedand the latchesretaining the closures fullyoperated to theclosed position;

or facility of description,

carrying the equipment usedin cable splicing, but itiisto be understood that my l-n-ven tion is not restricted o thejspecific applicaf'tion illustrated.

' the rear and side doors.

- on the back of the master door in open-posi f 7 Further objects and advantages of myine; vention will be apparent from the followingdescription and from the claims appended hereto, reference being made tov the panying drawing-in which:

Fig. 1 is a viewof'the'cableicart showing accom- Fig. 2 is a detailed view of thermechanism tion partially broken away.

F 1g. 3 is a view similar to -FigrQ mechanism inthe closed position.

Fig. l is a section online -bf Fig. 25 Fig. 5 is a front view of the latchon the SldGClOOI'. V Fig. 6 is a section on line 66 of Fig. 5.

Fig. 7 is the'frontview of the latches on; the rear, doors, partially broken awayJ-Q I *main do'or2. This will prevent the-latches 9 1 and 20 from entering-their respective sockets Fig. 8 is a section on line 8.8 of Fig. 7.

V Fig. 9 is a plan View, partially broken away, of the upper latching mechanism of, the -up per rear doors. 1 1

. The cart consists ofa body-1; having a door 2, completely closing the forward endof thecart. This door is employed as the master jdOor for the cart. Ineachfside of thecart I. have shown. my invention as embodied inandapplredi tog the closures on a small vehlcle sultable for;

there isa smalldoor3, and in the-upper rear portion thereis a double door.-4.-and 5.; Immediateliy below the main body. 0:1": thefca'rt-Ji-s'; a lower compartment which is'close'd'by means of a door 6. I

The master mechanism'Japplied tothe inner; side of door 2 is a suitable typeof latch operated by the-handle .7 which isfirmly fixed to a short shaft passing through the; doorjan'd V carrying O latches 9rare. slidably supported on the insideof'the door and: termlnat'eat their innertendsx-inracks 10- thatthe latches may enter'them only prema. ingthedooris fully closed.

meshing withthe gear 8. Theiouter ends: of latches 9 are adapted to enter suitable sockets; 11 in the body of the cart and: so positioned Asthe IatchesQ-are moved outwardly by V the rotation of the gear nected tothe slidel5- which afi'iXed to the latch 9.1 ,The

8 they actuate the levers 13 and 14. Lever 13is'pivotally coninturnis rigidly remote end of 'lever l3fis pivotally connected to-leverlt which; 2

The. free end of lever 14 isaolapted jto bear is-pivotall-y supported upon the door at'1'2. I

upona. shoulder 21 on bolt, 20. The upwardmotion of the bolt 2O will similarly cause-its upper end: to engage socket 22 providing-the;

qdo or be fully closed. -The bolt 20 carries a suitable lockingfdevice 61 accessible-from the outside only when'all the latches arelinthei r; I latchedJp'o'sition. V The lockingmember 26 may'then'be advanced to a position between the-inner ends of theslidesrloyby Ineansof the keysa'ct-uatedlock 61,. thus locking the master mechanism" until thev lock is opened.

Projecting through the body of the cart.

rods '28 and-;rod-'2'Z are slid'ably .mounted'a-nd so-locatedthatv when either of the side doors or-thi'erear door,.respectively,' are not proper-, lylatched their ends will project a distance' sufli cient to prevent the complete ,closureof.

until the other doors have been fullyrclosed. Considering now the rods 28'which areoptation of said. handle; aOn"e o-. t he. bolts- 81-,

' thedouble rear upper doors. lVhen door 6 notch 53.

36 thereon. Spring 39 tends to keep rod'28 in its projecting and interfering position with mam door2.

Rod 27 is operated in much the same way as rod 28but is distinguished therefrom in that it requirestheclosing of more than one door to renderitoperable. Handle '43 is rotatably mounted on lowerrear door 6 and is normally forced against the stop 45 by means of. the spring 44.. The lever 48 is thus normally retained in itsclosed position even though the door 6 may be opened. .A spring plate4 6 is mounted below the double rear upper doors in .a channel on the outside of the cartJIArm 48 at its upper end carries a hori-- zontalportion provided with an 'aperture49 adapted to receive the end of'the latch for is fully closed 'ar1n48 is adapted to move spring plate 46 against the pressure of spring 47 so that aperture 49 registers with the aperture in the bottom of-the doorframe, In its normal unoperated position the spring plate will cover aperture 50.

The upper door'4 carries a rotatable handle 42 for displacing the latches 51 connected thereto upwardly and downwardly. Theup per latch 53 adapted to receive the far end of rod'27l Springplate. 41 normally permits tapered end 52 to enter the aperture 62 to but a 'ited extend. .The closing of door 5 carrylng the tapered projection 54 causes the tapered projection to 'en'gagethe slot' therebyad vancing the spring plate'to the left agalnst' the'tension of spring 58 and causing the apertures 57' and 62t0 register'with aperture 5'6' in the body of the cart. The upper'latch 51 A may then be thrust through theseapertures and the end of rod 27 willregister with the The operation mechanism is as follows Completely'closing door 6 'causes'arm 48': to move spring plate 46 to uncover aperture 50' and regis ters aperture 49 with "50. On closing door 5 projection 54' engages slot 55 drawing the spring plate 41 to the left and registering apertures 57,62'and'56. Closing do'or -4'and rotating handle 42 looks the lower door 6 by causingthelower latch 51 toextend through apertures 49 and '50 and bolts the rear doors 4 and 5 by extending the upper latch '51 through apertures 62, 56 and 57, andregis '51j'i-s tapered at itsupper end 52' and somewhat below the end carries a notch ,40

of this latch and locking ters notch 53 with the end of rod 27. Closing side door 3 and operating the handle 30 causes latch 31 to project through the aperture 32 and displace the spring 33 and registers notch 38 with rod 34. Closing the master door 2 forces rods 28 and'27 against the pressure of theirrespective springs 39 and 59, the far end of rod 27 engaging notch 53 thereby locking the rear doors. The rearwardimovement of rod 28 caus'es'the projection 36 to force rod 34 downwardly to insert its lower end into notch 38 thereby loclring the side doors. Rotating the handle 7 advances thelatches 9 to engage their apertures 11 and advances bolt 20 against the pressure. otsprlng 24'to engage the aperture '22. Lock 6lis moved into a registering position with an opening in the master door permitting the" insertion of a key so that the tongue 26 maybe advanced between the inner end of the slide 15 thereby locking the master, docir. All doors are thus locked by the single In the. event that aside door be not locked the. master door 2'mayn0t, be closed in that the rod 28 will not be capable of any rearward movement. The projection 36 will strike'therod 34which will then bear .upon

spring plate 33 and allow no movement of any of the parts. In the. event that lower door 6 be not fully closed spring plate. 46 will cover aperture 50 and-thereby lower latch 51 .ofthe upper rear. door 4 willnot beable toproject through apertures 50 and .49. Similarly ,if door 5 be not closed spring plate 41.will not be. in a position to permit theupperrod 51 toenter apertures 62, 56 and 57. lf rear door4be not closed rod 27' will strike spring plate '41 and be incapable of rearward movement thereby preventing the closure of the master door. j What is claimed is lfln a latching system; an enclosure with a plurality of openings, closure members. for each of said openings, a. master latch on one of said closure members and latching means.

:forjeachofthe other closures associated with said master latch and preventing the 'opera-- 7 tion. of said master latch until all of such other closure members'are closedv and latched in a predetermined sequence of operations. 1 2. In a-latching system an enclosure provided with' a main door and with upper and lower auxiliary doors, a post between said upper and lower doors, a latch member on said upper auxiliary door; a spring controlled plate in said post fornorinally clos-- ing an opening therein'registeringwith said latching member, a spring controlled lever pivotally supported on said lower auxiliary doorand adapted to displace said plate and providedwithan opening to receive the'lowe'r end of said'latching' member when said lower auxiliary door is closed, and manually operated means for moving-said latching upper door thereby latching both doors.

3.- In a latching system, an enclosure provided with a main door andan' auxiliary. door,

a latching member on each door, a spring con- V trolled member on said enclosure and operaauxiliary doors, said auxiliary doors including an upper door'and a lower door in the same plane, upperandlower latching bars on saidupper auxiliary door, a first plate in said enclosure normally in thepath of the upper latching 'bar,a second plate in said enclosure between said upper and lower auxiliary doors and normally in the path of; said lower latching bar, means on said lower door for displacing said secondtplate when said lower door is closed, manually operated means for moving said latching bars when 3n the upper door is closedand said second platefis displaced, the motion of said upper path of said bar,

latchingbar displacing said first plate, and a rod in said enclosure normally abutting sa1d first plate and preventing the closure of said 'main door untilsaid first plate is displaced;

5. In a latching system, an enclosure provided with an upper and lower door in the same plane, a post between said doors, a latch:

ing bar on said upper door, aspringcoir trolled plate in said post normally in the adapted to displace the p n g a closing the lower door, and manually operated means onsaid upperdoor for moving said latching member into said opening on doors, a plate in said closing the upper door therebylatching both 6. In a latching system, an enclosure provided with aplurality of co-planaridoors with their axes at an angle to each other, a most rigid with said enclosurebetween said doors, a latching member on one of said post normally in. the

7 path of latching member, a spring controlled lever pivotally supported on the other of said doors and provided with an opening adapted to receive the end portion of the latching member, said lever being adapted to displace said plate when said other door is closed, and manually operated means on said first door for moving the latching memberfinto said a spring controlled lever pivotally supported on said lower door and provided with an opening, said lever being plate to. have said register with saidlatching baron member into said opening on closing the" openingnon;JcLosingsaid 'first door 'therebyr atching. botlnsaidcdoorsia Inga latch g-i y em:

alatchi gmembenen each doona spring turned membergin said f'enclosure operatively, maci ted-"With said door f r no mally li venting:the closure 7.; of the mai oor; w dgeron S id member, a stop :in;thepath of:

aid w dge-,2. aispr fig' "for normally holding said step against? the} edge oiisaid wedge, and

an enclosure spree idecl w th'amain-doona'nd aniauxiliarydoor,

manually i operable I means-5.011 said auxiliary: 7

or for. operating: 7 I i ligdoor is el0sed;. t0.

displace =said [spring whereb y the spring returned member may latching member wheni;

lee-grooved on clo-sing'fthe-main" door moving said stopfinto3a1i openi n memberthereby "locking sfaidifauxiliary "door.

8. In a latching system, an enclosure providedwit-h a main door and ing an upper door and a lower doorinthe same plane, upper and lower latching bars on said upper auxiliary door, thefend portion of said upper'latching member being tapered, a spring, controlled rod in said "en- 7 a plurality of auxiliary doors,-said auxiliary doors includthe latching:

closure operatively associated with -said upper auxiliary door and said main-door, and normally preventing the closing of the main door, a first plate in said-enclosure member and said rod and provided with openings to' receive the ends of fsaid member closure between said-upper and lower auxlower latching bar, auxiliary door' for plate when the lower end portion of saidlower'latchingbar, manually operated means for'moving saidlatohinglbars when the latching member enters the opening-in said and of said rod, a second plate in said 'en- Q 10.0 'iliary doors andnormally in the path of said f 5 7 means; on said lower 7 7 Y displacing said second 7 door is closed andprg, vided'wit-h an opening toree'eive the lower,"

7 normallyin the pathof said upperlatching upper door isclos'ed and [sa d second plateidisplaced whereby the lower"? v i 2. meansoll the lower auxiliary door and the 1 I lupper latchingmember enters an opening in saidifirst plate displacing said first plate,

said spring controlled rod enteringPOne of" said openings in saidfirst plate on closing the main door,and a means onsaid main door for latching all of said-auxiliary doors. 1

9. In a latching device, a latching bar on 'said'meinber', a second latching bar at an angle thereto also on said mem her and provided with ,agroove, alink on said first bar, a second link connected to said first link and pivoted centrally on said member with its free end resting in the groove of said second latching bar, and means for moving said first bar thereby movingsaid second bar.

10. In a latchingsystem, an enclosure, a main door, an auxiliary double .door, a latching member .on thef'one of. said auxiliary a closure member,-

andlocking it thereby locking doors; the upper end of which is 'tape'red, a

plate on said enclosure'provided with a phir'ality of openings; a spring controlled rod normally abutting said-plate and preventing the closureof said main door, 'a'tapered'projection on the other auxiliarydoor and adapted'o-n closing of said door to 'move said plate partially out of the path of said latching member, means for moving said; latching member and completely displacing said plate so that an'opening-therein registers with the end-of said rod permitting ofthe closure of the main door, and a means for latching said main door thereby locking said aux liary whereof; I hereunto subscribe 27th day of May, 1929.

y In -witness my name this 'STEP'HENVI-LYB. KIDD, 

